624 EXPERIMENT STATION RECORD. 



Inoculation experiments with nitrobacterine, nitragin, and lupine soil for 

 blue lupines on undecomposed white moorland, H. von Feilitzen (Svenska 

 Alosskulturfor. Tidskr., 24 {1910), No. 3, pp. 263-271, figs. 5).— The addition 

 of bacteria through inoculation has been found necessary for a normal develop- 

 ment of legumes on the newly-broken white moor soils at Flahult. Soils from 

 a field where legumes have been grown have always proved effective whether 

 the same or a quite different leguminous crop had been grown thereon. 

 Nitragin proved less certain and less effective for inoculation of white moor 

 soils than inoculated soil, and the cultures of nitrobacterine experimented with 

 proved worthless for this purpose. 



Ratio of phosphate, nitrate, and potassium on absorption and growth, 

 O. ScHREiNEB and J. J. Skinner (Bot. Gaz., 50 (1910), No. 1, pp. 1-30, figs. 

 9). — "In this study the growth relationships and concentration differences 

 were observed between solution cultures in which the phosphate, nitrate, and 

 potash varied from single constituents to mixtures of two and three in all 

 possible ratios in 10 per cent stages. 



" The better growth occurred when all these nutrient elements were present, 

 and was best in those mixtures which contained between 10 and 30 per cent 

 phosphate, between 30 and 60 per cent nitrate, and between 30 and 60 per cent 

 potash. The growth in the solutions containing all three constituents was much 

 greater than in solutions containing two constituents, the solutions containing 

 the single constituent giving the least growth, 



" The coucentration differences noticed in the solutions were also very strik- 

 ing, the greater reduction in concentration occurring where the greatest growth 

 occurred. 



" The change in the ratios of the solutions and the ratios of the materials 

 that were removed from the solutions showed that where the greatest growth 

 occurred, as above outlined, the solutions suffered the least change in ratio, 

 although the greatest change in concentration occurred. 



" The more the ratios in these solutions differed from the ratios in which 

 the greatest growth occurred, the more were the solutions altered in the course 

 of the experiment, the tendency in all cases seeming to be for the plant to 

 remove from any and all of these solutions the material in the ratio which 

 normally existed where greatest growth occurred. This did not actually occur 

 in all cases, owing to the unbalanced condition of some of the solutions. 



" The results show that the higher the amount of any one constituent present 

 in the solution, the more does the culture growing in that solution take up of 

 this constituent, although it does not seem able to use this additional amount 

 economically. 



" In the very early periods the ratio of i)hosphate absorption is low and the 

 potash absorption high, although in final growth the greater response is 

 obtained with nitrate, indicating relatively low phosphate requirement and 

 high potash i-equirement of the seedling plant." 



Farmyard manure, M. Cumming (Ann. Rpt. Sec. Agr. Nova Scotia, 1909, 

 pt. 2, pp. 53-72). — This article deals with the composition, value, and use of 

 manure. Particular attention is given to methods of handling the manure to 

 prevent losses. 



Losses of nitrogen from farm manure by using peat, straw, or pine shav- 

 ings for bedding, H. von Feilitzen (Srrnska Mosskulturfor. Tidskr., 2} 

 (1910), No. 1, pp. lO-3'i). — In experiments with 10 milch cows fed rations of 

 hay, straw, roots, and concentrates, the litter applied per head daily duriug 

 the diffei'ent periods was peat 5.11, straw 3.26. and shavings 13.665 kg. (11.24. 

 7.17, and 30.00 lbs.), respectively. The average amounts of mauiu-e produced 

 (exclusive of litter) were, for period 1, 30.3 kg. (S6.4('> lbs.), and for periods 



